Germ-detacher for roller-mills



(No Modelz) A. FREDENHAGEN.

Germ Detacher for Roller Mills.

No; 234,122. Patented Nov; 9,1880.

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ADOLPH FEEDENHAGEN, OF ST. CHARLES, lLLINOIS.

GERM-DETACHER FOR ROLLER-MILLS.

SPECIFICATION forming part of Letters Patent No. 234,122, dated November 9, 1886.

Application filed June 24, 1880.

' of St. Charles, in the county of Kane and State of Illinois, have invented certain newand useful Improvements in Germ-Detachers for RollecMills, which are fully described in the following specification, reference being had to,

the accompanying drawings, in which- Figure 1 represents a plan view of a machine embodying my improvements; and Fig. 2, a longitudinal vertical section of the same, taken on the line .99 m, Fig. 1.

In the operation of middlil'igs-puriliers the tailings or coarse middlings, as is well known, contain particles of the kernels which it is desirable to save and submit to subsequent operations for the purpose of saving the flour particles which are attached to the pieces of hull and germ. It is usual now to run this product of the middlings purifier through smooth rollers, which crush theparticles of the kernel and tend to separate the hull and germ from the valuable material; but in this latter operation flour particles pressed out and flattened by the action of the rollers frequently stick together and form little fiat disks, which are carried away with the other adhering coarser material, and so much valuable mate rial is still lost. Moreover, in the action of smooth rollers, whether porcelain or chilled iron, even on purified middlings, the effect is to flatten some tlourparticles into similar disks, so that they will not pass through the bolts, but are mixed with the lower grade, and to avoid such a result the rollers are now run with very little pressure.

My invention relates to mechanism for obviating these difficulties by separating these flattened flour particles, while avoiding any breaking up of bits of bull or germ which may be combined with them, so that all the valuable material may be saved, and in the operation on purified middlings the rollers may be run with greater pressure.

The invention consists of a cylinder covered with some soft but rough material, in combination with a belt run partly in contact therewith, covered with a similar material, between which the crushed product passes after it has come from the smooth rollers.

(No model.)

It also consists in combinations of special devices for accomplishing my purpose.

I will proceed to describe one mode of carrying out my invention in practical form, and the special improvements which it is desired to secure by Letters Patent will be more definitely pointed out in the claims.

In the drawings, A represents a box of any suitable size and form. A cylinder, B, is mounted in suitable bearings in the upper portion of this box, on one end of the shaft of which is a driving pulley or wheel, b. This cylinder is covered with coarse cloth, b, like canvas or any other like material. Leather with the undressed side outward will answer, it being necessary only that this covering shall be rough enough to break up the disks of crushed or pulverized material and detach 'them from the hull, but at the same time soft,

so as not to grind or pnlverize the bran.

A broad belt, (3, about equal in width to the length of the cylinder, is arranged to run around three rollers, D, E, and F, the former of which is mounted in the upper part of the box some distance in front of the cylinder; the second similarly mounted slightly in rear of the cylinder, and the third in the bottom of the boxjust below the cylinder. This belt is of the same or a similar material as the covering of the cylinder, or is composed of some other material provided with a surface-cover similar to that of the cylinder. It runs slack upon the pulleys, so as to pass down underneath the cylinder and in contact with the under side of the latter, as shown in Fig. 2 of the drawings.

The lower roller, F, is adjustable vertically for the purpose of tightening the belt. A setscrew, G, is shown in the drawings working in the journal-boxes of the roller-shaft for this purpose; but any suitable means may be employed to effect this adjustment.

An idle-roller, H, may be arranged underneath the belt between the roller D and the cylinder, for the purpose of holding the belt up against the cylinder. This device, however, is not indispensable.

The roller D is arranged at some distance in front of the cylinder to give room for the over this space. This hopper may be arranged to receive the product directly from the smooth rollers, if desired, or in any other manner to suit convenience.

The roller E is set far enough away from the cylinder to provide a slight opening between the cylinder and belt at the rear to al' low the ready discharge of the material and not keep it too long under the action of the breaking-surfaces.

Motion may be communicated to the belt by means of a small gear-wheel, J, on the end of the cylinder-shaft opposite to the drivingpulley engaging with a large gear-wheel, K, on the corresponding end of the shaft of the roller E.

Obviously, the surface movement of the belt will be considerably less than that of the cylinder, so that the differential will be obtained, and the material fed in through the hopper will be carried along between the cylinder and the belt, and the little disks of valuable material broken up by the action of the two surfaces. These two surfaces should be in contact only fora short distance, and the contactpressure should not be great, but the belt should be adjusted so as to lightly touch the cylinder, and thereby just break up the little masses of valuable material and detach them from any bits of bull or germ without grimling or pulverizing the latter, which would then become mixed with the valuable material.

The direction in which the cylinder and belt move is indicated by arrows in Fig. 3 of the drawings.

I have not given any dimensions for the cylinder, rollers, and gearing but the following is an illustration of a suitable arrangement, though i do not wish to be understood as limiting myself to these dimensions: the cylinder may be twelve inches in diameter and the roller E six inches, the small gear-wheel J nine inches, and the large wheel K eleven inches in diameter.

The product will be delivered over the rear of the roller E, and a hopper may be provided in the bottom of the box in which it may be received, and then submitted to the operation of suitable separating devices.

In the description above both the cylinder and belt are intended to move. and this is the preferable construction, as a greater amount of work may be accomplished within a given time than with any other arrangement. The

cylinder may be stationary, however, and the belt in motion, or the belt stationary and the cylinder in motion, with reasonably fair resuits, the main objection to either of these arrangements being that the operation is much more slowly performed.

In order to prevent any loss by materials sticking to either the cylinder or the belt, a brush, M, may be arranged in contact with the rear surface of the cylinder, and a similar brush, N, in eontactwith the rear portion of the belt just above the hopper L.

I have found by actual use that this mechanism is exceedingly efficient and satisfactory in its operation, effecting the saving of all, or nearly all, the valuable material, much of which has heretofore been lost.

It will be understood, of course, that changes may be made in some of the details of construction without departing from the principle of operation in my machine, and therefore [do not confine myself tothe identical construction and arrangement of. the parts as herein shown and described.

Having thus described my invention, what I claim as new, and desire 'to secure by Letters Patent, is-

1. The process herein described for treating the tailings of middlings-purifiers and other like products, the same consisting in running the product through smooth'faced rollers to crush the pieces of grain-kernels, and then passing the crushed product between two surfaces covered with a soft coarse fabric, one or both of which surfaces are moving, substantially as described.

2. The cylinder covered with a soft coarse material, in combination with the belt having a surface of a similar material, and arranged to run in light contact with a portion of the cylinder, substantially as and for the purpose set forth.

3. The cylinder B and belt 0, both being provided with a surface of soft coarse material, in combination with gearing arranged to give a differential movement to the cylinder and belt, substantially as and for the purpose set forth.

4. The cylinder B, in combination with the belt 0, rollers I) E F H, and gear-wheels J K, substantially as described.

5. The cylinder B, in combination with the belt (3, rollers D E F H, and brushes M and N, all constructed and operating substantially as described.

ADOLPH FREDENHAGEN.

Witnesses Jso. C. MACGREGOB, A. G. P. HOLLISTER. 

